Filling stop motion for looms



Nov. 17, 1931.

A. A. GORDON FILLING STOP MOTION FOR LOOMS Filed June 5, 1930 Patented Nov. 17, 1931 UNITED STATES PATENT OFFICE ALBERT A. GORDON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &; v KNOWLES LOOM WORKS, F WORCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS FILLING STOP MOTION FOR LOOMS Application filed June 5, 1930. Serial No. 459,358.

This invention relates to improvements in filling stop motions'for looms and it is the general object of the invention to improve the relation between the dagger and knockoff parts to reduce breakage.

In the form of filling stop motion employed on certain heavy looms, such as those operating with the Knowles head, there is a stand fixed to the loom breast beam having pivoted 0 thereto a lever normally in rear position. A

dagger on the lay is raised to clear the knockoff lever when weft is present, but when weft is absent the dagger engages the lever to stop the loom. The bracket is provided with a 5 cam surface to lift the dagger immediately after it has passed the engaging end of the lever for the purpose of raising the tines of the fork off the filling. As heretofore constructed the lever and cam face have been 0 located very close to each other and the dagger has had a knife edge to insure correct engagement withthe lever. This knife edge has extended far enough to engage the cam face, and the latter, being formed of cast iron, becomes nicked or pitted so that in time it will hold the dagger and cause the same to break as the lay moves forwardly. It is an important object of my present invention to provide the dagger with a relatively sharp 0 knocking-off edge to engage the lever and also a rounded surface to cooperate with the cam.

The knock-off lever cooperates with an arm secured to the shipper shaft and as heretofore constructed said arm has been out of line with the holder for the dagger so that the force acting to stop theloom is transmitted along an offset path. It is a further object of my present invention to relate the raised by means of a connector having rod heads affording relatively narrow bearing surfaces for the studs which transmit force to and recelve force from the connector, and

y it is a further object of my invention to provide a simplified form of connector bent from strip stock and having relatively large bearing surfaces for the studs. T

With these and other objects in view. which will appear as the description proceeds my convenient embodiment of my invention is set forth, I

Fig. 1 is a vertical central section through the front portion of the loom showing a center stop motion having my invention applied thereto, the lay being in rear position with the fork raised,

Fig. 2 is atop plan view of the structure shown in Fig. 1, parts being removed,

Fig. 3 is a vertical section on an enlarged scale on line 33 of Fig. 2, V

Fig. 4; is an end levation of a connector,

Fig. 5 is a front elevation of the connector shown'in Fig. 4, and

Fig. 6 ,is a detail front elevation of the Fig. 3.

In Fig. 1 I have shown a breast beam 10 having a stand 11 in which is rotatably mounted a shipper shaft 12. The latter has dagger looking in the direction of arrow 6,

secured thereto a knock-off arm 13 which ex- 1 tends rearwardly to lie under a lug'let carried by a C-shaped knock-off lever 15. The lever is pivoted to a stud 16 supported by a bracket 17 secured to and extending rearwardly from the breast beam 10. A blunt end 18 is formed on the lever to engage a fixed stop 19 and limit rear movement of the lever. A spring 20 acts to hold the knockoff lever yieldingly in the position shown in full lines inFig. 1.

A cam plate 21 having a forwardly and downwardly inclined face 22 is adjustably secured to the bracket 17 and the latter has a raised cam 23 formed on the upper surface thereof.

The lay 24: is provided with a filling fork 25 supported by a holder 26 pivoted with respect to the lay and having a rearwardly extending arm 27 A dagger holder 28 is pivotedwith respect to the lay below the fork and moves around a center 29.

The matter thus far described is common, the cam 23 being shown in patent to Gagnon No. 1,243,831 of October 23, 1917.

As heretofore constructed the knock-off lever has had a notch located close to the cam 23, but in carrying .my invention into effect I form the lever 15 with a shoulder 40 extending above the blunt end 18 and spaced from the bracket 17 and having a notch 41. A dagger 42 has a shank 43 extended into and secured to the holder 28. The forward end of the dagger is bent parallel to the lay, or transversely of the bracket 17 and has a lower comparatively sharp edge 44 as shown in Fig. 3 to engage the notch 41. This edge extends toward the bracket 17 for a short dis t'ance, but terminates before reaching the latter, merging into a round surface 45. The surface 45 rides down the cam face 22, along the upper surface of the bracket 17, and over the cam 23. Ordinarily, the knife edge will never engage the cam 23, nor will the rounded part 45 engage the notch 41. The shoulder 40 is spaced s-ufiiciently from the bracket 17 so that some latitude is provided for placing the zone in which the knife edge 44 and rounded surface 45 merge. The dagger is heat treated so as to present a hard edge to the notch 41, and the round portion 45, which may also be heat treated, will not injure the casting carrying cam 23.

Another feature of my invention relates to the connection 50 between the tines and the holder 28. As shown in Figs. 4 and 5 this connector is made of a piece of flat mate rial bent to have eyes 51 and52 in the upper and lower parts thereof, respectively, the upper eye fitting over a stud 53 on the arm 27 and the lower eye fitting over a stud 54 on the holder 28. The stock used nfay be as broad as desired, its breadth determining the length of the bearing.

Under normal conditions, as the lay moves forwardly and weft is present, the rounded part 45 of the dagger will move downwardly along the cam 22 until the fork engages the weft, whereupon further downward movement of the dagger is prevented and it will pass over the upper end of the knock-off lever 15, avoiding the notch 41. As the lay continues forward movement the dagger part 45 will engage the hump or cam 23 and be lifted, causing a corresponding upward movement of the fork. lVhen weft is absent,

however, the dagger knife edge 44 is permitted to enter the notch 41 and cause rocking movement in a left hand direction as viewed in Fig. 1 of the lever 15, causing lug 14 to depress the arm 13 and give the shipper shaft 12 a rocking movement in a knockingoff direction. The raising cam 23 will act during continued forward movement of the lay to raise the dagger out of the notch 41 so that the lever 15 may come to rest before the lay reaches its extreme forward position.

From the foregoing it will be seen that I have provided an improved form of dagger having both angular and rounded parts which are separated, the one to cooperate with the knock-off device and the other to engage the lifting cam, said knock-off device and cam being also spaced so as to permit the angular and rounded portions of the dagger to merge into each other gradually. It will be seen by referring to Fig. 2 that this result is accomplished by a construction wherein the knocking-off force is transmitted from the angular part of the dagger to the arm 13 in a direction indicated by arrows A substantially in a single plane, the thrust from the dagger to the shoulder 44 being in a straight line and in the direction of the advance of the lay. It will further be seen that the spacing of the shoulder 44 from the bracket 1? permits this transmission of power as described. It will also be seen that I have provided. an improved form of connectorbetween the tines and the dagger affording a relativelylong bearing surface.

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of. the invention and I do not wish to be limited to the details herein disclosed, but what I claim is:

1. In a filling stop motion having a fixed bracket provided with a cam, a dagger movable over the bracket and having a rounded portion to engage the cam, a knock-oil device having a dagger engaging portion spaced from the bracket, and an edge formed on the dagger to engage the knock-off device, said edge and rounded portion of the dagger being axially aligned transverse to the movement of the dagger and said edge portion being out of contact with the rising cam at all imes.

2. Ina filling stop motion having a fixed bracket provided with a cam, a knock-off device movable with respect to the bracket and having an operative surface spaced from the latter, and a weft controlled dagger having a rounded portion adapted to contact with the cam and be out of engagement at all times with the operative surface, and said dagger having an edge spaced from the rounded portion in a direction substantially transverse to the movement of the dagger and positioned for engagement with the operative surface and out of engagement at all times with said cam.

3. In a filling stop motion having a fixed bracket and a cam, a knock-off device movable with respect to the bracket and having an operative surface spaced from the latter, and a dagger to cooperate with the cam and operative surface, said dagger having rounded and angular portions which are axially aligned which merge gradually one with the 7 other, the rounded portion to cooperate with the cam and the angular portion to cooperate with the operative surface.

4. In a filling stop motion having a fixed bracket provided with a cam, a shipper shaft, an arm secured thereto and extending rearwardly, a knock-off member movable with respect to the bracket and having a part to engage said arm, said member having an operative surface spaced from the bracket, and a dagger having a rounded portion and an angular portion in substantially axial alignment, the angular portion to engage the operative surface and movable forwardly toward the shipper shaft, the part of the dagger which engages the operative surface together with the latter and the arm on the shipper shaft all lying substantially in a single plane parallel to the direction in which the dagger moves.

5. In a filling stop motion having a fixed bracket provided with a cam, a shipper shaft, an arm secured thereto and extending rearwardly, a knock-off member movable with respect to the bracket and having a part to engage said arm, said member having an operative surface spaced from the bracket, and a dagger having an angular portion to engage the operative surface and movable forwardly toward the shipper shaft, the angular portion of the dagger which engages the operative surface together with the latter and the arm on the shipper shaft all lying substantially in a single plane parallel to the direction in which the dagger moves, said dagger having a rounded portion to be out of engagement at all times with the operative surface and positioned to cooperate with the-cam, the rounded portion and the angular portion which en gages the operative surface being axially aligned in a direction transverse to the movement of the dagger.

6. In a filling stop motion having a fixed bracket provided with a cam, a knock-off lever pivoted to the bracket and having an operative surface spaced from the bracket, a shipper shaft, an arm secured to the shaft and extending rearwardly to be engaged and depressed by the lever, and a dagger movable forwardly toward the shipper shaft, said dagger having rounded and angular portions spaced from each other axially aligned in a direction transverse to the movement of the dagger, the rounded portion to cooperate with the cam on the bracket and the angular portion to cooperate with the operative surface, said angular portion of the dagger, the operative surface of the lever, and the arm all lying substantially in a single vertical plane which is parallel to the direction of movement of the dagger.

7. In a filling stop motion having a fixed bracket provided with a cam, a knock-elf lever pivoted to the bracket and having an operative surface spaced from the bracket,

a shipper shaft, an arm secured to the shaft and extending rearwardly to be engaged and depressed by the lever, and a-dagger movable forwardly toward the shipper shaft, said dagger-having rounded and angular portions spaced from each other axially aligned in a direction transverse to the movement of the dagger, the rounded portion to cooperate with the cam on the bracket and the angular portion to cooperate with the operative surface, said angular portion of the dagger, the operative surface of the lever and the arm all lying substantially in a single vertical plane which is parallel to the direction of movement of the dagger, the rounded and angular portions of the dagger merging gradually one to the other.

8. A dagger for a filling stop motion having a fixed cam and a movable operative surface spaced from the cam, said dagger having a. rounded surface to cooperate with the cam and having also an angular part to cooperate with the operative surface, the rounded surface and angular part of the dagger being spaced from each other and ALBERT A. GORDON. 

